BenQ Q7C3 - Page 15

Q7C3 LCD Monitor Service Guide
Engineering Specification
15
4. Response time
TrR measures the transition time of L1 relative luminance from white to black state, from 90% to 10% (see graph below)
TrD measures the transition time of L1 relative luminance from black to white state, from 10% to 90% (see graph below)
5. Cross talk shall be measured between two patterns.
FULL WHITE
184 gray level
0 gray level
1/2 1/6 2/3 1/61/2 1/3
1/6
1/3
1/2
2/3
A A'
B
B'
184 gray level
l L
A
-L
A’
l / L
A
x 100%= 1.2% max., L
A
and L
B
are brightness at location A and B
l L
B
-L
B’
l / L
B
x 100%= 1.2% max., L
A’
and L
B’
are brightness at location A’ and B’
LA：Luminance of measured point in A (cd/m2)
LB：Luminance of measured point in B (cd/m2)
LA’：Luminance of measured point in A’ (cd/m2)
LB’：Luminance of measured point in B’ (cd/m2)
(at Viewing Angle
o
0φ0
θ
o
== , )
6. Brightness Uniformity of these 9 points is defined as below:
5
1
10%
90%
50%
90%
10%
50%
2
4
3
6
7
8
9
100%
90%
TrR TrD
WHITE
BLACK
10%
0%
t
WHITE